/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchyController.h
Adds a new parent to an element. For elements that allow only one parent the parent will be replaced (Same as ::SetParent).
Returns true if successful.
bool AddParent ( [FRigBaseElement](API\Plugins\ControlRig\Rigs\FRigBaseElement) * InChild, [FRigBaseElement](API\Plugins\ControlRig\Rigs\FRigBaseElement) * InParent, float InWeight, bool bMaintainGlobalTransform, bool bRemoveAllParents )